Pneumatic straw-stacker



No. 748,640. PATENTED JAN. 5, 1904.

N. L. NELSON.

PNEUMATIG STRAW STAGKEB..

mflwwm No. 748,640. l

- N. L. NELSON.

PNBUMATIG STRAW STAGKBR.

APPLIGATION FILED MAR. 4, 1903.

N0 MODEL. 2 SHEETS-SHEET 2.

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Patented January .5, 1904.

UNITED STATES-PATENT OFFICE.

NELS L. NELSON, OF OROOKSTON, MINNESOTA.

PN EUIVIATIC STRAW-STACKER.

SPECIFGATION forming part of Letters Patent No. 748,640, dated January 5, 1904.

Application iiled March 4, 1908.

y To all whom it may concern,.-

Be it known that I, NELS L. NELSON, acitizen of the United States, residing at Crookston, in the county of Polk and State of Miunesota, have invented a new and useful Pneumatic Straw-Stacker, of which the following is a speciication. Y

The invention .relates toimprovements in pneumatic straw-stackers.

The object of the present invention is to improve the construction of straw-stackers and to provide a simple and comparatively inexpensive pneumatic one adapted to permit dust and chaff from the screens to pass through the fan or fans and capable also of enabling heavy articles to drop through it before reaching the fans to avoid injuring the latter.

-A further object of the invention is to decrease the weight of the blower and at the same time enable the blower to operate with increased eect on thematerial to be stacked.

A further object is to provide a pneumatic strawstacker of this character in which only the dust' and chad will pass through the blower and in which agitators and analogous devices usually employed where both the straw and the chaff pass through the blower will bedispensed with.

The invention also has for its object to provide a straw-stacker to be arranged in position adjacent to a separator to'receive they dust and chaff directly from the sieves or screens and provided with means in advance of the fan or fans to receive the straw, so that the latter will not come in contact with the fan or fans.

Furthermore, it is the object of the present invention to provide a pneumatic strawstacker adapted to be mounted on a supplemental frame of a separator to form a permanent attachment forthe same and capable also of being arranged on a wheeled truckframe to enable it to be readily transported from one place to another and to operate in connection with various separators.

With these and other. objects in view the invention consists inthe novel construction and arrangement of parts hereinafter fully described, illustrated in the accompanying drawings,and particularly pointed out in the claims hereto appended, it being understood to another.

Serial No. 146,151. (No model.)

that changes in the proportion and minor details of construction within the scope of the claims may be made without departing from the spirit or sacrificing any of the advantages of the invention.

` In the drawings, Figure 1 isa longitudinal sectional view of a pneumatic straw-stacker constructed in accordance with thisinvention and shown applied to a separator. Fig. 2 is a plan View of the straw-stacker. Fig.' 3 is a horizontal sectional view. Fig. 4 is a transverse sectional view on the line 4 4 of Fig. 3. Fig. 5 is asimilar View on the line 5 of Fig. 3. Fig. 6 is a side elevation of the strawstacker, illustrating the manner of mounting the same on a wheeled truck-frame.

Like nu merals of reference designate corresponding parts in all the figures of the drawings.

1 designates a casing designed to be constructed of sheet metal or any other suitable material and forming the body portion of the straw stacker and designed to be either mounted upon a supplemental frame 2 of a separator, as illustrated in Fig. lof the'drawings, or upon a wheeled truck-frame 3, as shown in Fig. 6, 'and when constructed as shown in Fig. 6 the truck-frame will be provided with a suitable draft beam or tongue 4 to enable the pneumatic straw stacker to be readily conveyed from one place or point The frame 2 is composed of horizontal side bars or beams and upright bars or standards 5 and 6, rising from the side beams, which are connected by suitable transverse bars or beams '7. The body portion of the casing is preferably reinforced at its upper edges by a marginal frame 8, composed of suitable bars and supported by. the upright bars or standards 5 and 6.

The body portion of the stacker is provided at the rear with vertically-disposed fan-casiugs l0, spaced apart, as clearly shown in Fig. 2, and provided at opposite sides with openings 11, forming air-intakes. The rear portion of the body of the straw-stacker is also provided with central andA side hoppers 12 and 13, and the tops of the fan-casings 10 are oppositely inclined to form inclined walls at the contiguous sides or portions of the hoppers. The hoppers 12 and 13 areprovided with inclined walls, as shown, and the cen- IOC tral hopper is divided at the rear by an upwardly-tapered deflector 15, which is adapted to direct the dust and chaff to the inner side portions of the fan-casings. The fan-casings contain suitable fans 14, mounted upon a transverse shaft 16 and forming a blower for driving the material through a tube or chute 17. The rear hoppers, which are designed to be located adjacent to the sieves or screens of a separator 18, as illustrated in Fig. 1 of the drawings, are opened at the bottom, as clearly shown in Figs. 3 and 4, to permit heavy objects, such as cylinder-teeth, to pass through the stacker and fall to the ground without entering the fan-casings, whereby the fans are prevented from being injured by such objects. The hoppers are located at each side of each fan-casing and are adapted to direct the dust and chaff to the openings 11, and the suction produced by the fans will draw the dust and chaff into the fan-casing. The openings of the bottoms of the rear hoppers are shown slightly exaggerated and in practice such openings will be of a size to permit cylinder-teeth and other heavy objects liable to injure the fans to fall to the ground without entering the fan-casings. The fancasings are cylindrical, as clearly shown, and the oppositely-inclined top portions preferably consist of approximately inverted-V- shaped portions or caps 19, mounted upon the fan-castings, as indicated in Fig.4, to form oppositely-inclined hopper-walls. The tapering guard or deector 15 is preferably formed by bending the rear wall of the central hopper, as indicated in Fig. 1 of the drawings; but any other form of deilector may be provided. The fan-casings are provided at their upper portions with tubular or hollow extensions 20, communicating with the lower portion of the rear wall of a front hopper 21, extending entirely across the stacker and arranged to receive straw from the separator to enable the straw to be operated on by the fan without passing through the fan-casings, thereby preventing the blower from becoming clogged and obviati n g the necessity of employing agitators and similar devices for carrying the chaff over the fan. The front hopper 21 is provided with inwardly-inclined walls, and it has an opening 22 at the lower portion of its front wall, and the said opening 22 communicates with the throat-section 23 of the tube or chute 17. The throat-section 23 of the tube or chute is outwardly tapered and is elliptical in cross-section. The lower or inner end of the throat-section is provided with an extension 24 and is supported by suitable brackets or plates 25, pivotally connected with the frame of the straw-stacker. The curved extension 24 conforms to the configuration of the bottom of the front hopper and permits the t ube or chute to swing upward or downward to adjust it in the ordinary manner without separating the chute and the hopper. The bottom of the hopper 21 is curved, as clearly shown in Fig. 1,to t the extension 24, and these two overlap ping parts,

Vwhich are segmental, are concentric with the ing the sections thereof on each other to vary the length of the tube or chute. The dust and chaff fromv the separator fall into the rear hoppers and are directed bythe same toward the side openings of the fan-casings and are drawn into the same by the fans. The straw drops into the front hopper in advance of the fans,which drive the dust, chaff, and straw outwardly through the tube or chute. This arrangement and operation permits the blower to be constructed much lighter than those through which the straw passes, and there is no liability of the blower becoming clogged by the straw. Also the openings of the bottoms of the rear hoppers permit heavy objects, such as cylinder-teeth, to pass through the strawstacker and fall to the ground without entering the fan-casings and injuring the fans. l

The straw-stacker is provided at the front hopper with a guard or hood 25, constructed of suitable material, such as canvas or duck, and supported by a suitable frame 26. The guard or hood 252L is adapted to close the end of a separator, as shown in Fig. 1, and it directs the straw into the front hopper.

' It will be seen that the dust and chaff from the sieves or screens fall into the fan or fans and are carried through the same into the chute and that the openings at the bottoms of the hoppers permit heavy articles to fall through the stacker without injuring the fan or fans. It will also be apparent that one or more fans may be employed to suit the size of the machine to which the pneumatic stacker is applied.

1. In a straw-stacker, the combination of a blower haying a lateral opening, and a hopper arranged to direct material toward the lateral opening of the blower and provided at its bottom with an opening to permit heavy objects to drop through the straw-stacker, substantially as described.

2. In a straw-stacker, the combination of a blower provided with lateral openings, rear hoppers located at opposite sides of the blower to direct material to the lateral openings and provided with open bottoms to permit heavy objects to fall through the straw-stacker, and

a front hopper located in advance of thel blower, substantially as described.

3. In a straw-stacker, the combination of a blower having aplurality of fan-casings and provided at opposite sides of the same with hoppers having open bottoms to permit heavy objects to drop through the stacker, and fans operating in the casings, substantially as described.

IOO

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4. In a straw-stacker, the combination of a blower, a rear hopper provided with an Vopen bottom and arranged to direct chaff toward the blower, and a front hopper arranged in advance of the blower to receive the straw, substantially as described.

5. In a straw-stacker, the combination of a blower having a plurality of fan-casings, rear hoppers arranged at opposite sides of the fancasings to direct material to the same and provided with bottom openings, and a tapered deflector located between the fan-casings, substantially as described.

6. In a straw-stacker, the-combination of a blower having lateral openings, rear hoppers arranged to direct chaff to the blower and provided with open bottoms, a front hopper arranged to receive the straw and communicating at its back with the Yblower, and a chute connected with the front of the front hopper, substantially as described.

7. In a straw-stacker, the combination of a casing forming the body of the stacker and provided with front and rear hoppers, fancasings mounted in the rear portions of the said casing and located between the rear hophaving an intermediate outlet located at a point between the discharge end of the strawstacker and the fan to permit heavy articles to drop through the straw-stacker, substantially as described.v

, In testimony that I claim the foregoing as my own I have hereto aflxed my signature in the presence of two witnesses.

NELs L. NELSON.

Witnesses:

D. W. CONKLIN, ARTE: PAULSBERG. 

